Long time ago, before the Inca s existed people are lived on this land. About 16000 years ago groups of people are believed to have crossed the Bering Strait from Asia and survived as nomads, gathering fruits and vegetables and fishing in the sea, rivers, and lakes. The evident is hunting tools dating back 11000 years have been found in the caves. They try to domesticate vicunas and guanacos but they were not successful, up to date they still live in the wild. But their offspring llamas and alpacas did adapt and became an important source of food, transportation and clothing. Those who lived in the coast and along rivers or lakes learned how to build tools to gather fish and seashells. At about the same time they experimented with seeds and plants, they learned about the soil, water needed for different plants and weather conditions in which each crop succeeded. They built terraces and learned how to channel water to irrigate their fields. One of the first domesticated seeds was the brown bean and the lima bean. Among the most important domesticated crops are potatoes, quinoa, yucca, tomatoes, peanuts, pumpkin, chili, beans, and corn. They also domesticated the cotton plant that became the foundation of the local textile industry; it was also used in the building of nets used for fishing.

http://www.discover-peru.org/caral-kotosh/